August 21, 1909

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Features

Racing Yachts in a Gale

Twenty Miles under the Sea

Peary and the North Pole

Electricity

Engineering

Science

The First Cross-Country Flight of the Aeronautic Society's Biplane

Testing a Torpedo-Boat Defense

By An Eyewitness

A Record Cross-Country Motor-Boat Trip

Thunderstorms

The Effect of Polar Currents on Gulf Stream Plankton

A New Application of the Diving Bell

The Excavations at Delos

Conjunctions of the Planets

By Frederic R. Honey

A Novel Solution of the Problem of Telephotography

By Alfred Gradenwitz

Departments

Departments

Correspondence

Recently Patented Inventions

Index of Inventions

New Books, Etc.

Patents

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